Any teacher in the coordinated program of the St. Paul Teachers Retirement Fund Association who is on an authorized medical leave of absence and subsequently returns to teaching service is entitled to receive allowable service credit, not to exceed one year, for the period of leave, upon making the prescribed payment to the fund. This payment must include the required employee and employer contributions at the rates specified in section 354A.12, subdivisions 1 and 2a, as applied to the member's average full-time monthly salary rate on the date the leave of absence commenced plus interest at the applicable annual rate or rates specified in section 356.59, subdivision 5, compounded annually, from the end of the fiscal year during which the leave terminates to the end of the month during which payment is made. The member must pay the total amount required unless the employing unit, at its option, pays the employer contributions. The total amount required must be paid by the end of the fiscal year following the fiscal year in which the leave of absence terminated or before the member retires, whichever is earlier. Payment must be accompanied by a copy of the resolution or action of the employing authority granting the leave and the employing authority, upon granting the leave, must certify the leave to the association in a manner specified by the executive director. A member may not receive more than one year of allowable service credit during any fiscal year by making payment under this section. A member may not receive disability benefits under section 354A.36 and receive allowable service credit under this section for the same period of time.